Which of the following is one of the six DR rules?

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Multiple Choice

Which of the following is one of the six DR rules?

Updating the dead reckoning (DR) position at fixed intervals is essential because DR is a projection of where you are based on the last known fix, your current course, and speed. Small errors from current, leeway, and heading drift accumulate over time, so you refresh that projection regularly to keep it aligned with reality. Doing this every hour on the hour provides a clear, consistent schedule for plotting and logging, and it helps ensure you don’t drift too far from your true position between fixes. The other options don’t fit as standard DR rules. Plotting after a single line of position isn’t sufficient to manage drift over time. Updating after every course change is good practice, but it’s not the predefined interval rule. Labeling fixes with course, speed, time, and DR is a good logging habit, but not the procedural DR update rule described.

Updating the dead reckoning (DR) position at fixed intervals is essential because DR is a projection of where you are based on the last known fix, your current course, and speed. Small errors from current, leeway, and heading drift accumulate over time, so you refresh that projection regularly to keep it aligned with reality. Doing this every hour on the hour provides a clear, consistent schedule for plotting and logging, and it helps ensure you don’t drift too far from your true position between fixes.

The other options don’t fit as standard DR rules. Plotting after a single line of position isn’t sufficient to manage drift over time. Updating after every course change is good practice, but it’s not the predefined interval rule. Labeling fixes with course, speed, time, and DR is a good logging habit, but not the procedural DR update rule described.

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